Indholdsfortegnelse for Issue 2 i Coding & Programming The Complete Manual

01000011 01101111 01100100 01100101 Essentially all forms of coding are made up of ones and zeros, on or off states. This works for a modern computer and even the oldest known computational device. ~87 BC It’s difficult to pinpoint an exact start of when humans began to ‘program’ a device. However, it’s widely accepted that the Antikythera Mechanism is possibly the first ‘coded’ artefact. It’s dated to about 87 BC and is an ancient Greek analogue computer and orrery used to predict astronomical positions. ~850 AD The Banū Mūsā brothers, three Persian scholars who worked in the House of Wisdom in Baghdad, published the Book of Ingenious Devices in around 850 AD. Among the inventions listed was a mechanical musical instrument, a hydro-powered organ that played interchangeable cylinders automatically. 1800…

C++ is an amazing programming language. Most of what you see in front of you when you power up your computer, regardless of whether you’re using Windows, macOS or Linux, is created using C++. Being able to code in C++ will open a whole new world for you, in terms of desirable professional skills and the ability to code amazing apps and games. C++ is an efficient and powerful language that’s used to develop operating systems, applications, games and much more. It’s used in science, engineering, banking, education, the space industry, and much more.…

C++ SETUPS As most, if not all, operating systems have C++ at their code, it stands to reason that you can learn to program in C++ no matter what OS you’re currently using. ◻ COMPUTER Unless you fancy writing out your C++ code by hand on a sheet of paper (which is something many older coders used to do), then a computer is an absolute must have component. PC users can have any recent Linux distro or Windows OS, Mac users the latest macOS. ◻ AN IDE An IDE is used to enter and execute your C++ code. Many IDEs come with extensions and plugins that help make it work better, or add an extra level of functionality. Often, an IDE will provide enhancements depending on the core OS being…

XCODE Apple’s Xcode is primarily designed for users to develop apps for macOS, iOS, tvOS and watchOS applications in Swift or Objective-C, but we can use it for C++ too. STEP 1 Start by opening the App Store on your Mac, Apple Menu > App Store. In the Search box enter Xcode, and press Return. There will be many suggestions filling the App Store window, but it’s first option, Xcode, that you need to click on. STEP 2 Take a moment to browse through the app’s information, including the compatibility to ensure you have the correct version of macOS. Xcode requires macOS 10.12.6 or later to install and work. STEP 3 When you’re ready, click on the Get or cloud icon button which will install the Xcode app. Enter your…

This section contains the building block of C++, from learning how to compile and execute your first C++ code, through to developing user interaction. There’s a lot to learn with C++, but these tutorials, tips and tricks will lead you in the right direction. C++ is different to the other programming languages in this book, and it’s continually evolving as the applications that require it are forever improving. If you know C++, then you’re well on your way to becoming a much sought-after coder and a vital member of the coding community.…

THE IMPORTANCE OF COMMENTING Comments inside code are basically human readable descriptions that detail what the code is doing at that particular point. They don’t sound especially important but code without comments is one of the many frustrating areas of programming, regardless of whether you’re a professional or just starting out. In short, all code should be commented in such a manner as to effectively describe the purpose of a line, section, or individual elements. You should get in to the habit of commenting as much as possible, by imagining that someone who doesn’t know anything about programming can pick up your code and understand what it’s going to do simply by reading your comments. In a professional environment, comments are vital to the success of the code and ultimately,…

STRING THEORY There are different ways in which you can create a string of characters, which historically are all carried over from the original C language, and are still supported by C++. STEP 1 To create a string you use the char function. Open a new C++ file and begin with the usual header: #include <iostream> using namespace std; int main () { } STEP 2 It’s easy to confuse a string with an array. Here’s an array, which can be terminated with a null character: #include <iostream> using namespace std; int main () { char greet[8] = {‘W’, ‘e’, ‘l’, ‘c’, ‘o’, ‘m’, ‘e’, ‘\0’}; cout << greet << “\n”; } STEP 3 Build and run the code, and ‘Welcome’ appears on the screen. While this is perfectly fine,…

Python is one of the most respected and used programming languages in the world. It’s designed to help beginners get into code, but also has some amazingly powerful features that are utilised by data scientists and engineers around the world. You don’t need to look too far to Python at work. It’s used throughout the Internet, and helps drive some of the biggest projects and companies in a multitude of industries. In this section, we will look at what you will need to get started with Python. First steps into a new learning experience are always the hardest, but we’re here to help.…

Python creator Guido Van Rossum named Python afterreading scripts from Monty Python’s Flying Circus. Alexa, Amazon’s Virtual Personal Assistant, uses Python to help with speech recognition. As of the end of 2018, Python was the most discussed language on the Internet. PYTHON AND LINUX SKILLS ARE THE THIRD MOST POPULAR I.T. SKILLS IN THE UK. Data analysis and Machine Learning are the two most used Python examples. Disney Pixar uses Python in its Renderman software to operate between other graphics packages. OVER 75% OF RECOMMENDED CONTENT FROM NETFLIX IS GENERATED FROM MACHINE LEARNING – CODED BY PYTHON. 90% OF ALL FACEBOOK POSTS ARE FILTERED THROUGH PYTHON-CODED MACHINE LEARNING. IT’S ESTIMATED THAT OVER 75% OF NASA’S WORKFLOW AUTOMATION SYSTEMS ON BOARD THE I.S.S. USE PYTHON. There are over 16,000 Python jobs…

INSTALLING PYTHON 3.X Microsoft Windows doesn’t come with Python pre-installed as standard, so you’re going to have to install it yourself manually. Thankfully, it’s an easy process to follow. STEP 1 Start by opening your web browser to www.python.org/downloads/. Look for the button detailing the Download link for Python 3.x. Python is regularly updated, changing the last digit for each bug fix and update. Therefore, don’t worry if you see Python 3.7.0, or more, as long as it’s Python 3, the code in this book will work fine. STEP 2 Click the download button for version 3.x, and save the file to your Downloads folder. When the file is downloaded, double-click the executable and the Python installation wizard will launch. From here you’ll have two choices: Install Now and Customise…

It’s a long way from creating your fist Python code to controlling a robot on Mars, but it’s not impossible. Every advanced and professional Python coder started with the base fundamentals, tips and fixes mentioned in this section. With these foundation Python concepts, you will be able to advance your skills and branch out into whatever Python project you have in mind. From printing Hello World on the screen, looking into conditions and loops, asking a user for input and reacting to it, to using variables to control your code, this is where your Python skills are forged.…

EDITING CODE You will eventually reach a point where you have to move on from inputting single lines of code into the Shell. Instead, the IDLE Editor will allow you to save and execute your Python code. STEP 1 First, open the Python IDLE Shell. When it’s up, click on File > New File, this will open a new window with Untitled as its name. This is the Python IDLE Editor, and within it, you can enter the code you need to create your future programs. STEP 2 The IDLE Editor is, for all intents and purposes, a simple text editor with Python features, colour coding and so on. You enter code as you would within the Shell, so taking an example from the previous tutorial, enter: print(“Hello everyone!”) STEP…

#COMMENTS! A method used by most programmers for keeping their code readable, is by commenting on certain sections. For example, if a variable is used, the programmer comments on what it’s supposed to do. It’s just good practise. STEP 1 We’ll start by creating a new instance of the IDLE Editor (File > New File), and then create a simple variable and print command: a=10 print(“The value of A is,”, a) Save the file, and execute the code. STEP 2 Running the code will return the line: The value of A is, 10 into the IDLE Shell window – which is what we expected. Now let’s add some of the types of comments you’d normally see within code: # Set the start value of A to 10 a=10 # Print…

FUNKY FUNCTIONS A function is a command that you enter into Python in order to do something. It’s a little piece of self-contained code that takes data, works on it, and then returns the result. STEP 1 It’s not only data that a function works on. Functions can do all manner of useful things in Python, such as sort data, change items from one format to another, and check the length or type of items. Basically, a function is a short word followed by brackets. For example, len(), list(), or type(). STEP 2 A function takes data, usually a variable, works on it depending on what the function is programmed to do, and returns the end value. The data being worked on goes inside the brackets, so if you wanted…

Did you know that Windows has its own built-in scripting language? Batch files have been around since the early days of Windows, and while they are overshadowed by the might of Windows’ modern graphical user interface, they are still there and still just as capable as they were thirty years ago. Batch file programming is a skill that system administrators still use, so it’s worth spending a bit of time learning how they work, and what you can do with them. This section introduces batch files, and covers user interactions, variables, loops and even a batch file quiz game to inject an element of fun.…

INPUT, OUTPUT Batch files are capable of taking a normal Windows command and executing it, while also adding extra options and flags in to the equation. STEP 1 Let’s keep things simple to begin with. Create a new batch file called ‘dirview.bat’, short for Directory View. Start with the @echo off command and under that add: dir “c:\users\YOURNAME\Documents\Batch Files” > c:\users\YOURNAME\dirview.txt Substitute YOURNAME with your Windows username. STEP 2 The new line uses the dir command to list the contents of the directory Batch Files, in your Home directory, dumping the output to a text file called dirview.txt in the root of your Home directory. This is done, so that the Windows UAC doesn’t require elevated permissions, as everything is in your own Home area. Save and run the batch…

COUNTERS Creating code that counts in increasing or decreasing number sets is great for demonstrating loops. With that in mind, let’s look at the If statement a little more, alongside more variables, and introduce the Else, Timeout and eof (End of File) commands. STEP 1 Start by creating a new batch file called count.bat. Enter the following, save it and run: @echo off cls set /a counter=0 :numbers set /a counter=%counter%+1 if %counter% ==100 (goto :eof) else (echo %counter%) timeout /T 1 /nobreak > nul goto :numbers STEP 2 The count. bat code starts at number one and counts, scrolling down the screen, until it reaches 100. The Timeout command leaves a one second gap between numbers and the Else statement continues until the counter variable equals 100 before going…

DVD BOOTABLE MEDIA We’re using a Windows 10 PC here to transfer the ISO to a DVD. As long as you’re using a version of Windows from 7 onward, the process is extremely easy. STEP 1 First locate the ISO image of Linux you’ve already downloaded. In Windows 7, 8.1 and 10 computers, you’ll usually find this in the Downloads folder unless, when saving it, you’ve specified a different location. STEP 2 Next, insert a recordable DVD disc into your computer’s optical drive. After a few seconds, while the disc is read, Windows will display a pop-up message asking you what to do with the newly inserted disc, ignore this as we’re going to use the built-in image burning function. STEP 3 Right-click the Linux ISO and from the menu…

CREATING THE VM There are plenty of options to choose from when creating a VM. For now though, we’ll setup a VM adequate to run the excellent Linux Mint, and perform well. STEP 1 With VirtualBox open, click on the New icon in the top-middle of the right-hand panel of the app. This will open the new VM Wizard. STEP 2 In the box next to Name type Linux Mint, and VirtualBox should automatically choose Linux as the Type and Ubuntu (64-bit) as the Version, if not then use the drop-down boxes to select the correct settings (remember Mint mainstream is based on Ubuntu). Click Next when you’re ready to proceed. STEP 3 The next section will define the amount of system memory, or RAM, the VM has allocated. Remember…

VARIABLES Just as in every other programming language a Bash script can store and call certain variables from the system, either generic or user created. STEP 1 Let’s start by creating a new script called hello.sh; xed hello.sh. In it enter: #!/bin/bash, then, echo Hello $1. Save the file and exit Xed. Back in the Terminal make the script executable with: chmod +x hello.sh. STEP 2 As the script is now executable, run it with. / hello.sh. Now, as you probably expected a simple ‘Hello’ is displayed in the Terminal. However, if you then issue the command with a variable, it begins to get interesting. For example, try. /hello.sh David. STEP 3 The output now will be Hello David. This is because Bash automatically assigns variables for the user, which…

EASY AUTOMATION AND HANDY SCRIPTS Are you entering line after line of commands to retrieve system information, find a file or rename a batch of files? A script is a better answer. STEP 1 Let’s start by creating a script to help display the Mint system information; always a handy thing to have. Create a new script called sysinfo.sh and enter the following into Xed, or the text editor of your choice. STEP 2 We’ve included a couple of extra commands in this script. The first is the -e extension for echo, this means it’ll enable echo interpretation of additional instances of a new line, as well as other special characters. The proceeding ‘31;43m’ element enables colour for foreground and background. STEP 3 Each of the sections runs a different…

You will find that nearly all the professional developers out there will set aside some time to plan out how their code is going to fit into the wider project on which they’re working. Regardless of whether they’re working as part of a team on the latest game, developing a workflow user interface for the company, or creating a set of automated tasks that can be used across a number of different platforms, each developer will set out their code in a plan. The planning stages can be unique to the developer, unique to the company for which they’re working, or the project on which they’re working. Planning meetings will often sketch out a rough plan of how the end product will function, with each developer team then working on…

If you can think back to some of the classic text adventures you may have played in the past, consider the amount of work that was needed to get them up and running. If you’re not familiar with a text adventure, then open a browser and go to http://textadventures.co.uk/games/play/5zyoqrsugeopel3ffhz_vq. This is an online version of the classic text adventure Zork. Zork was created for the DEC PDP-10 workstations, using the MDL programming language back in the late seventies. Despite its age, it’s still considered one of the best text adventures to play. Zork, or any other text adventure game, features several elements necessary to make the game both interesting and playable. INGREDIENTS FOR A COMPELLING ADVENTURE The first ingredient is a story, a plot that will take the player on…

It’s amazing how far display prices have fallen, while their quality continues to rise. Take this one, for example. It’s a specialist, quad hi-definition (QHD) gaming monitor with a giant 31.5-inch screen. It runs at 165Hz, has a 1ms response time and a 300 nits rating, yet it costs well south of 400 notes. The AOC CQ32G2SE Gaming Monitor features a tool-free setup. You can get it up and running out of the box in five minutes flat, without having to root around for the right spanner or screwdriver. Just snap the display onto the stand and fit the foot using a finger-turned screw. It’s no hassle at all. Around the back of the display are two HDMI ports and a DisplayPort. There’s no Thunderbolt connectivity (though you can use…

If you’re serious about your gaming, you have to get a decent controller. A joypad that feels comfortable in the hands, with all its buttons and inputs within easy reach. Something with a full range of controls, including four face buttons, a D-pad, two analogue sticks and twin shoulder buttons; a now-standard setup as used by recent Xbox and PlayStation consoles. A joypad like the GameSir G4 Pro. You can connect your G4 Pro to a Windows PC using a dongle that fits in the back of the joypad when not in use or via the USB-C charging cable supplied. Unfortunately, it’s not Mac-compatible and nor can it be used with an Apple TV set-top box. You can use it with your smartphone or tablet over Bluetooth and even with…

WaterField Designs makes deluxe bags for connoisseurs. They’re not cheap, but the quality is outstanding. You could use a WaterField bag every day of your working life, then give it to your grandchild and it would still be in good condition. This particular WaterField Designs product, the Zoom Crossbody Laptop Bag, is available in two sizes. The Compact version fits devices up to 11 x 8 inches, and is ideal for your tablet Pro and a Magic Keyboard. The Tall version can handle notebooks up to 12.75 x 8.75 inches such as Apple’s 13-inch range, including the new M1-powered MacBook Pros. It’s available in a range of colours, and sports a comfortable shoulder strap that holds your Apple gear in a portrait position. The main body of the bag is…

Risers for your computer or monitor aren’t exactly thin on the ground but as you’d expect, this model from Twelve South goes that extra yard with careful planning and design. As well as raising your iMac or external display to a more comfortable height, it features a handy space underneath for all your bits and pieces. The shelf, which is perforated for airflow, is the perfect size and shape for a Mac mini too. If you use Apple’s small form factor Mac with a monitor, Curve Riser is the ideal way to keep them tidy on your desk; saving space. Alternatively, use it for a USB optical drive, Thunderbolt hub, audio interface or just about anything else you can think of. The space underneath the riser is a good fit…

This home security camera is a different beast from the SWANN model covered elsewhere on the page. It lacks heat and noise detection, but it can detect motion at up to 16 feet. When it does so, it records 30 seconds of footage and uploads them to the cloud or your Dropbox account. It has a 130-degree angle-view and a fixed focus from between just under two feet to infinity. You can watch live too, of course, and, unusually for a security monitor, there’s a privacy shutter you can activate when you don't want the camera to record you. Video quality is excellent and it works well both night and day. It’s designed to stand on a flat surface. If you want to wall-mount it, you have to buy a…

Everything you do online, every time you power on your smart TV, whenever you use your in-car GPS, use your phone, play a game on a tablet, console or PC, it’s all been coded by a group of people. All these ones and zeros are developed by those who have learned how to code, and with this book you too can learn how to get started on the road to becoming a programmer. We cover C++, Python, and Linux Scripting within these pages. There’s a huge section of project ideas, type-in listings, and in-depth looks at how code works. But first, let’s begin with a good foundation.…

SQL SQL stands for Structured Query Language. SQL is a standard language for accessing and manipulating databases. Although SQL is an ANSI (American National Standards Institute) standard, there are different versions of the SQL language. However, to be compliant, they all support at least the major commands such as Select, Update and Delete in a similar manner. JAVASCRIPT JavaScript (often shortened to JS) is a lightweight, interpreted, object-oriented language with first class functions. JavaScript runs on the client side of the web, that can be used to design or program how the web pages behave on the occurrence of an event. JavaScript is an easy to learn and also powerful scripting language, widely used for controlling web page behaviour. JAVA Java is the foundation for virtually every type of networked…

LINUX++ There are many different versions of Linux available, for this example we’re using one of the more popular distributions: Linux Mint. However, these steps will work in any Debian-based Linux. STEP 1 The first step with ensuring Linux is ready for your C++ code is check the system and software are up to date. Open a Terminal and enter: sudo apt-get update && sudo apt-get upgrade. Press Return and enter your password. These commands updates the entire system and any installed software. STEP 2 Most Linux distros come preinstalled with all the necessary components to start coding in C++. However, it’s always worth checking to see if everything is present, so still within the Terminal, enter: sudo apt-get install build-essential and press Return. If you have the right components,…

HELLO, WORLD! It’s traditional in programming for the first code to be entered to output the words ‘Hello, World!’ to the screen. Interestingly, this dates back to 1968 using a language called BCPL. STEP 1 We’re going to use Windows 10 and the excellent IDE Code::Blocks for the rest of the C++ code and tutorials in this book. Begin by launching Code::Blocks. When open, click on File > New > Empty File or press Ctrl+Shift+N on the keyboard. STEP 2 Now you can see a blank screen, with the tab labelled *Untitled1, and the number one in the top left of the main Code::Blocks window. Begin by clicking in the main window, so the cursor is next to the number one, and entering: #include <iostream> STEP 3 At the moment…

THE DECLARATION OF VARIABLES You can declare a C++ variable by using statements within the code. There are several distinct types of variables you can declare. Here’s how it works. STEP 1 Open up a new, blank C++ file and enter the usual code headers: #include <iostream> using namespace std; int main() { } STEP 2 Start simple by creating two variables, a and b, with one having a value of 10 and the other 5. You can use the data type int to declare these variables. Within the curly brackets, enter: int a; int b; a = 10; b = 5; STEP 3 You can build and run the code but it won’t do much, other than store the values 10 and 5 to the integers a and b.…

PYTHON POWER Ever since the earliest home computers were available, enthusiasts, users and professionals have toiled away until the wee hours, slaving over an overheating heap of circuitry to create something akin to magic. These pioneers of programming carved their way into a new frontier, forging small routines that enabled the letter ‘A’ to scroll across the screen. It may not sound terribly exciting to a generation that’s used to ultra high-definition graphics and open world, multiplayer online gaming. However, forty-something years ago it was blindingly brilliant. Naturally these bedroom coders helped form the foundations for every piece of digital technology we use today. Some went on to become chief developers for top software companies, whereas others pushed the available hardware to its limits and founded the billion pound gaming…

WHAT WE’RE USING Thankfully, Python is a multi-platform programming language available for Windows, macOS, Linux, Raspberry Pi and more. If you have one of those systems, then you can easily start using Python. ◻ COMPUTER Obviously you’re going to need a computer in order to learn how to program in Python and to test your code. You can use Windows (from XP onward) on either a 32 or 64-bit processor, an Apple Mac or Linux installed PC. ◻ AN IDE An IDE (Integrated Developer Environment) is used to enter and execute Python code. It enables you to inspect your program code and the values within the code, as well as offering advanced features. There are many different IDEs available, so find the one that works for you and gives the…

STARTING PYTHON As when learning anything new, you need to start slow. You can pick up the pace as your experience grows, but for now, let’s just get something appearing on the screen. Don’t worry, you’ll soon be coding like a pro! STEP 1 Click on the Windows Start button, and start typing ‘idle’. The result will be the currently installed version of the Python IDLE on your system. You can Pin it to the Start for convenience, otherwise simply click the icon to launch the Python Shell. STEP 2 The Shell is where you can enter code and see the responses and output of code you’ve programmed into Python. This is a kind of sandbox, if you will, where you’re able to try out some simple code and processes.…

COMMAND THE CODE Using the code we created in the previous tutorial, the one we named hello.py, let’s see how we can run code that was made in the GUI at the command line level. STEP 1 When you first installed Python, the installation routine automatically included all the necessary components to allow the execution of code outside of the GUI IDLE; in other words, the command line. To begin with, click on the Windows Start Button, and type: cmd. STEP 2 As you did when launching the Python IDLE, click on the returned result from the search, the Command Prompt App. This will launch a new window, with a black background and white text. This is the command line, also called a Terminal in macOS, Linux, and Raspberry Pi…

VARIOUS VARIABLES We’ll be working with the Python 3 IDLE Shell in this tutorial. If you haven’t already, open Python 3 or close down the previous IDLE Shell to clear up any old code. STEP 1 In some programming languages, you’re required to use a dollar sign to denote a string, which is a variable made up of multiple characters, such as a name of a person. In Python this isn’t necessary, so, for example, in the Shell enter: name=”David Hayward” (use your own name, unless you’re also called David Hayward). STEP 2 You can check the type of variable in use by issuing the type () command, placing the name of the variable inside the brackets. In our example, this would be: type (name). Add a new string variable:…

TRUE CONDITIONS Keeping conditions simple, to begin with, makes learning to program a more enjoyable experience. Let’s start then by checking if something is TRUE, then doing something else if it isn’t. STEP 1 Let’s create a new Python program that will ask the user to input a word, then check it to see if it’s a four-letter word or not. Start with File > New File, and begin with the input variable: word=input(“Please enter a four-letter word: “) STEP 2 Now we can create a new variable, then use the len function and pass the word variable through it to get the total number of letters the user has just entered: word=input(“Please enter a four-letter word: “) word_length=len(word) STEP 3 Now we’ll use an if statement to check if…

.BAT MAN A Windows batch file is simply a script file that runs a series of commands, one line at a time, much in the same fashion as a Linux script. The series of commands are executed by the command line interpreter and stored in a plain text file with the. BAT extension; this signifies to Windows that it’s an executable file, in this case, a script. Batch files have been around since the earliest versions of Microsoft DOS. Although not exclusively a Microsoft scripting file, batch files are mainly associated with Microsoft’s operating systems. In the early days, when a PC booted into a version of DOS (which produced a simple command prompt when powered up), the batch file was used in the form of a system file called…

USING MORE VARIABLES Here’s a good example of mixing system and environmental variables with some of your own creation, along with a number of external Windows commands. STEP 1 Create a new batch file called list.bat and start it off with the @echo off command. Begin by clearing the command prompt screen and displaying a list of the current directories on the computer: cls dir “c:\” > list.txt type list.txt echo. STEP 2 Save and execute the batch file. Within the command prompt you can see the contents of all the files and directories from the root of the C:\ drive; and as any user under Windows has permission to see this, there’s no UAC elevated privileges required. STEP 3 Now, create a batch file that displays the contents of…

LINUX MINT – LINUXMINT.COM By far the most popular Linux distro (distribution) is Linux Mint. Mint began life back in 2006, as an alternative to the then, most popular distro, Ubuntu. Although based on Ubuntu’s Long Term Support build, Linux Mint took a different direction to offer the user a better overall experience. Linux Mint has three main desktop versions available with each new version of the core OS it releases. This may sound confusing at first, but it’s quite simple. Currently, Linux Mint uses the Cinnamon Desktop Environment as its flagship model, although MATE and Xfce models are also available. Cinnamon is a graphically rich desktop environment, while MATE uses less fancy graphics but is more stable on a wider variety of desktop systems and finally Xfce is an…

UEFI BIOS The Unified Extensible Firmware Interface (UEFI) is used to identify hardware and protect a PC during its boot-up process. It replaces the traditional BIOS, but can cause issues when installing Linux. STEP 1 Insert your DVD or USB flash drive into your PC and, if you haven’t already, shutdown Windows. In this instance, we’re using the USB boot media but the process is virtually identical. Start the PC and when prompted press the appropriate keys to enter the BIOS or SETUP; these could be, for example, F2, Del or even F12. STEP 2 There are different versions of a UEFI BIOS, so covering them all would be impossible. What you’re looking for is a section that details the Boot Sequence or Boot Mode. Here you’ll have the option…

TAKING COMMAND The command line is at the core of Linux and when you program with it, this is called scripting. These are self-contained programs designed to be run in the Terminal. STEP 1 The Terminal is where you begin your journey with Linux, through the command line and thus any scripting from. In Linux Mint, it can be accessed by clicking on the Menu followed by the Terminal icon in the panel, or entering ‘Terminal’ into the search bar. STEP 2 The Terminal will give you access to the Linux Mint Shell, called BASH; this gives you access to the underlying operating system, which is why scripting is such a powerful language to learn and use. Everything in Mint, and Linux as a whole, including the desktop and GUI,…

IF, THEN, ELSE With most programming structures there will come a time where you need to loop through the commands you’ve entered to create better functionality, and ultimately a better program. STEP 1 Let’s look at the If, Then and Else statements now, which when executed correctly, compare a set of instructions and simply work out that IF something is present, THEN do something, ELSE do something different. Create a new script called greeting2.sh and enter the text in the screenshot below into it. STEP 2 Greeting2.sh is a copy of greeting.sh but with a slight difference. Here we’ve added a loop starting at the if statement. This means, IF the variable entered is equal to David the next line, THEN, is the reaction to what happens, in this case…

TOP 10 COMMANDS These may not be the most common commands used by everyone but they will certainly feature frequently for many users of Linux and the command line. cd The cd command is one of the commands you will use the most at the command line in Linux. It allows you to change your working directory. You use it to move around within the hierarchy of your file system. You can also use chdir. ls The ls command shows you the files in your current directory. Used with certain options, it lets you see file sizes, when files where created and file permissions. For example, ls ~ shows you the files that are in your home directory. cp The cp command is used to make copies of files and…

You will reach a point in your Python coding experience when you need to rely on some external resources to help you through a sticky patch in your project or give you a bit of inspiration. Python resources are available throughout the Internet, but not all of them are any good. If you spend any time looking up code for a particular project, then you’re likely to come across copious examples, yet not all of them seem to work. That’s one of the main issues with resources for Python. With the language being twenty-nine years old, and many different versions under the bridge, there’s a significant amount of content out there that’s simply out of date – or just wrong for the version you’re using. Newer versions, even by one…

ADVENTURE.PY The Adventure game uses just the Time module to begin with, creating pauses between print functions. There’s a help system in place to expand upon, as well as the story itself. Adventure Time This, as you can see, is just the beginning of the adventure and takes up a fair few lines of code. When you expand it, and weave the story along, you’ll find that you can repeat certain instances such as a chance meeting with an enemy or the like. We’ve created each of the two encounters as a defined set of functions, along with a list of possible choices under the cmdlist list, and cmd variable, of which is also a defined function. Expanding on this is quite easy, just map out each encounter and choice…

Welcome to the launch issue of Tech Shopper Magazine. In this new publication from Papercut Ltd, our team of technology experts combine their many, MANY years of experience to craft the ultimate buyers guide that covers all major formats. In this first issue, we take an in-depth look at all sorts of gadgets and gismos for your Apple gear. If it’s a head turner, for good or bad reasons and is compatible with a Windows, Android, Samsung, iPhone, iPad or Mac, we’ve covered it inside. In fact, this magazine is 100% reviews and previews as we devote the whole magazine to covering the latest software, add-ons and more. And we haven’t neglected software either. We cover a wide range of apps and games for all your tech gear. In the…

his wireless charger powers three of your Apple devices at once. The vertical stand on the left holds – and charges – your Apple Watch. The charger is built-in. You don’t have to use the one that came with your watch like you do with some charging stands, so you can keep that for travel. In front of it is a recessed area where you place your AirPods (2nd gen or Pro). On the right of the unit is a regular wireless charger for your smartphone, as long as it’s wireless-charging compatible. Three chargers in one. Unfortunately, there’s no USB port around the back for cabled charging. The charger is available in both black and white. The black model has a premium Ultrasuede fabric finish, while the white one boasts…

You can’t fault the price. For less than 60 notes, the Kami Indoor 360 Smart-Home Camera offers 340° rotation and 90° tilt, dual band wi-fi, two-way audio, night vision and 1080p high definition recording. It’s not at the expense of quality either. It’s robust and stylish, with an understated profile that sits discreetly wherever you wish to position it; and its recordings are sharp and smooth. It has to be used indoors, of course. The camera is not weatherproof or waterproof, so it cannot be set up outside. It has to be reasonably close to a plug socket too. A long USB lead is supplied so you can power it from the mains plug provided or a computer’s USB port but there’s no battery option. The Kami Indoor 360 Smart-Home…

Your brand-new smartphone might well be the pinnacle of mobile phone gaming but is your controller up to speed? Do you even have a controller? If not, this amazing, pocket-sized add-on could be just what you’re looking for. The Kishi folds down when not in use for easy storage and portability. When opened up it stretches out to accommodate smartphones of all sizes. A Lightning connector plugs into your phone and a through-port lets you plug in your Lightning cable and charge while you play. There’s no need to cut your gaming short because your smartphone’s battery is almost drained. There’s a free app too but this is just for firmware updates and information; there’s no heavy setting up to do. Its comprehensive control set will prove familiar to anyone…

If you remember the review we did of the devolo Magic 2 Wi-Fi Starter Kit back in Issue 2, you know that powerline adapters are a great way of extending the reach of your cabled and wireless network using your house’s electrical wiring. A powerline setup consists of at least two plugs, which fit in your household mains sockets. By connecting one of them to your router using a supplied Ethernet cable and plugging the other into any mains socket in the house, you create a cabled connection between your router and the second adapter. This unit can offer a wireless access point for your network, Ethernet ports for cabled connectivity, or both. devolo’s Magic 2 LAN Triple powerline adapter starter set doesn’t offer Wi-Fi access, but it does have…

Multiple award-winning Things is widely regarded as the best task management app for Apple devices. Those with power-user needs might prefer OmniFocus but for the vast majority of us, ease of use and a clear, Apple-like interface make Things the ‘getting things done’ (GTD) app of choice. But what makes it so good? Things is designed to help you organise every aspect of your life, from daily routines to long-term goals. When you first launch Things, there’s a tutorial project you can keep or delete. If you’re new to the app, it’s best to work your way through it; in ten minutes, you’ll have a decent understanding of how it all works and how to get the most from the app. You can then delete it when you’re done and…

Ever come across a video on YouTube and wished you could download it for offline viewing, or cut it to DVD and watch it on your living-room TV? Of course you have. Everybody has. With Airy, you can do just that. It’s easy to use. Simply navigate to the YouTube video you want to download, then copy and paste the URL into the field in the Airy app, choose a resolution and click Download. You can download videos as MP4, FLV, and 3GP, with HD, 4K and 8K Ultra HD resolutions supported, or go for MP3 to download only the audio. Airy can also be integrated into most popular web browsers, such as Safari, Chrome, Firefox, Opera and Explorer too, to download directly from your bookmarks bar. If you've a…

Coding can be one of those experiences that sounds fantastic, but is often confusing to tackle. After all, there’s a plethora of languages to choose from, countless apps that will enable you to code in a specific, or range, of languages and an equally huge amount of third-party software to consider. In addition, by accessing the Internet, you will discover that there are countless coding tutorials available for the language in which you’ve decided you want to program, alongside even more examples of code. It’s all a little too much at first. The trick is to slow down and, to begin with, not look too deeply into coding. Like all good projects, you need a solid foundation on which to build your skillset and to have all the necessary tools…

CODE::BLOCKS Code::Blocks is a free C++, C and Fortran IDE that is feature rich and easily extendible with plugins. It’s easy to use, comes with a compiler and has a vibrant community behind it too. STEP 1 Start by visiting the Code::Blocks download site, at www.codeblocks.org/downloads. From there, click on the ‘Download the binary releases’ link to be taken to the latest downloadable version for Windows. STEP 2 There you can see, there are several Windows versions available. The one you want to download has mingw-setup.exe at the end of the current version number. At the time of writing this is: codeblocks-17.12mingw-setup.exe. The difference is that the mingw-setup version includes a C++ compiler and debugger from TDM-GCC (a compiler suite). STEP 3 When you’ve located the file, click on the…

DEVELOPING C++ Here are ten great C++ IDEs that are worth looking into. You can install one or all of them if you like, but find the one that works best for you. ECLIPSE Eclipse is a hugely popular C++ IDE that offers the programmer a wealth of features. It has a great, clean interface, is easy to use and available for Windows, Linux and Mac. Head over to www.eclipse.org/downloads/ to download the latest version. If you’re stuck, click the Need Help link for more information. GNAT The GNAT Programming Studio (GPS) is a powerful and intuitive IDE that supports testing, debugging and code analysis. The Community Edition is free, whereas the Pro version costs; however, the Community Edition is available for Windows, Mac, Linux and even the Raspberry Pi.…

GREETINGS FROM C++ Compiling and executing C++ code from Code::Blocks is extraordinarily easy; it’s just a matter of clicking an icon and seeing the result. Here’s how it’s done. STEP 1 Open Code::Blocks, if you haven’t already, and load up the previously saved Hello World code you created. Ensure that there are no visible errors, such as missing semicolons at the end of the std::cout line. STEP 2 If your code is looking similar to the one in our screenshot, then look to the menu bar along the top of the screen. Under the Fortran entry in the topmost menu you can see a group of icons: a yellow cog, green play button and a cog/play button together. These are Build, Run, Build and Run functions. STEP 3 Start by…

THE VALUE OF DATA There are many different data types available for the programmer in C++, such as an integer, floating point, Boolean, character and so on. It’s widely accepted that there are seven basic data types, often called Primitive Built-in Types; however, you can create your own data types should the need ever arise within your code. The seven basic data types are: TYPE COMMAND Integer Integer Floating Point float Character char Boolean bool Double Floating Point double Wide Character wchar_t No Value void These basic types can also be extended using the following modifiers: Long, Short, Signed and Unsigned. Basically this means the modifiers can expand the minimum and maximum range values for each data type. For example, the int data type has a default value range of-2147483648…

HELLO, DAVE You have already used cout, the standard output stream, throughout our code. Now you’re going to be using cin, the standard input stream, to prompt a user response. STEP 1 Anything that you want the user to input into the program needs to be stored somewhere in the system memory, so it can be retrieved and used. Therefore, any input must first be declared as a variable, so it’s ready to be used by the user. Start by creating a blank C++ file with headers. STEP 2 The data type of the variable must also match the type of input you want from the user. For example, to ask a user their age, you would use an integer like this: #include <iostream> using namespace std; int main ()…

Python’s ability to create highly readable code, within a small set of instructions, has a considerable impact on our modern digital world. From being an ideal first programmers’ choice through to being able to create interactive stories and games; from scientific applications through to artificial Intelligence and web-based applications, the only limit to Python is the imagination of the person coding in it. It’s Python’s malleable design that makes it an ideal language for many different situations and roles. Even certain aspects of the coding world that require more efficient code still use Python. For example, NASA utilises Python both as a stand-alone language and as a bridge between other programming languages. This way, NASA scientists and engineers are able to get to the data they need without having to…

PYTHON POWER Python is a high-level, general-purpose programming language that was designed by Guido van Rossum in the late ‘80s, as a successor to the ABC Programming Language, and became available to use in 1990. The Python Software Foundation, a non-profit organisation devoted to both furthering and improving Python, currently develops the language. The foundation’s purpose is to “promote, protect, and advance the Python programming language, and to support and facilitate the growth of a diverse and international community of Python programmers.” The structure of Python code has been designed to flow easily, allowing those who are just beginning to code to follow it without too much difficulty. Yet, despite its ease of use, Python is regularly used throughout a number of industries in real-world scenarios. Big Data and AI…

THE POWER OF PI While having a far more powerful coding platform on which to write and test your code is ideal, it’s not often feasible. Most of us are unable to jump into a several hundred-pound investment when we’re starting off and this is where the Raspberry Pi can help out. While having a far more powerful coding platform on which to write and test your code is ideal, it’s not often feasible. Most of us are unable to jump into a several hundred-pound investment when we’re starting off and this is where the Raspberry Pi can help out. The Raspberry Pi is a fantastic piece of modern hardware that has created, or rather re-created, the fascination we once all had about computers, how they work, how to code…

PLAYING WITH PYTHON As with most languages, computer or human, it’s all about remembering and applying the right words to the right situation. You’re not born knowing these words, so you need to learn them. STEP 1 If you’ve closed Python 3 IDLE, re-open it as you did in the previous page. In the Shell, enter the familiar following: print(“Hello”) STEP 2 As predicted, the word Hello appears in the Shell as blue text indicating output from a string. It’s fairly straightforward, and doesn’t require too much explanation. Now try: print(“2+2”) STEP 3 You’ll notice that instead of the number 4, the output is the 2+2 you asked to be printed to the screen. The quotation marks are defining what’s being outputted to the IDLE Shell, to print the total…

IT’S ALL MATHS, MAN You can get some really impressive results from the mathematical powers of Python, as maths is the driving force behind the code with most, if not all, programming languages. STEP 1 Open up the GUI version of Python 3, as mentioned you can use either the Shell or the Editor. For the time being, we’re going to use the Shell. If you’ve opted to use a third-party text editor, note that you need to get to the IDLE Shell for this part of the tutorial. STEP 2 In the Shell enter the following: 2+2 54356+34553245 99867344*27344484221 As you can see, Python can handle some quite large numbers. STEP 3 You can use all the customary Mathematical operations: divide, multiply, brackets and so on. Practise with a…

USER FRIENDLY The type of input you want from the user will depend greatly on the type of program you’re coding. A game, for example, may ask for a character’s name, whereas a database can ask for personal details. STEP 1 If it’s not already, open the Python 3 IDLE Shell, and start a New File in the Editor. Let’s begin with something really simple, enter: print(“Hello”) firstname=input(“What is your first name? “) print(“Thanks.”) surname=input(“And what is your surname? “) STEP 2 Save and execute the code, and, as you no doubt suspected, in the IDLE Shell the program will ask for your first name, storing it as the variable firstname, followed by your surname; also stored in its own variable (surname). STEP 3 Now that we have the user’s…

MASTERING MODULES Think of modules as an extension that’s imported into your Python code to enhance and extend its capabilities. There are countless modules available, and as we’ve seen, you can even make your own. STEP 1 Although good, the built-in functions within Python are limited. The use of modules, however, allows us to make more sophisticated programs. As you are aware, modules are Python scripts that are imported, such as import math. STEP 2 Some modules, especially on the Raspberry Pi, are included by default; the Math module is a prime example. Sadly, other modules aren’t always available. A good example on non-Pi platforms is the Pygame module, which contains many functions to help create games. Try: import pygame. STEP 3 The result is an error in the IDLE…

SEARCHING FOR FILES Here’s an interesting little batch file that you can easily extend for your own use. It asks the user for a file type to search for and displays the results. STEP 1 We are introducing a couple of new commands into the mix here but we think they’re really useful. Create a new batch file called seek.bat and in it put: @echo off cls color 2 echo Please enter the type of file you want to search for (MP3, DOC, JPG for example) echo. STEP 2 The new command in this instance is color (Americanised spelling). Color, as you already assume, changes the colour of the command prompt display. The color attributes are specified by two hex digits, the first corresponds to the background colour of the…

Linux is such a versatile operating system that’s both malleable and powerful, while offering the programmer a perfect foundation on which to build their skills. While all the popular and mainstream programming languages are available on Linux, as they are on Windows and macOS, Linux also utilises its own coding language, called scripting. Bash scripting on Linux can be used to create a wealth of useful, real-world programs that interact with the user, or simply work in the background based on a pre-defined schedule. Scripting is a powerful interface to the Linux system, so we’ve crafted this section to help you get to grips with how everything fits together, and how to make some amazing Linux scripts.…

MINTY INGREDIENTS Here’s what you’ll need to install and run Linux Mint as we work through this book. You have several choices available, so take your time and see which works best for you. SYSTEM REQUIREMENTS The minimum system requirements for Linux Mint are as follows: CPU 700MHz RAM 512MB Hard Drive Space 9GB (20GB recommended) Monitor 1024 x 768 resolution Obviously the better the system you have, the better and quicker the experience will be. USB INSTALLATION You can install Linux Mint onto your computer via USB or DVD. We’ll look into each a little later on, but if you’re already familiar with the process (or you’re thinking of USB and just gathering the hardware you’ll need), then you’re going to need a minimum 4GB USB flash drive/stick to…

GOING VIRTUAL Using a Virtual Machine (VM) will take resources from your computer: memory, hard drive space, processor usage and so on. So make sure you’ve got enough of each before commencing. STEP 1 We’re using VirtualBox in this instance, as it’s one of the easiest virtual environments to get to grips with. Enter www.virtualbox.org and click on ‘Download VirtualBox’. This will take you to the main download page. Locate the correct host for your system: Windows or Mac – the Host is the current installed operating system and click the link to begin the download. STEP 2 Next, while still at the VirtualBox download page, locate the VirtualBox Extension Pack link. The Extension Pack supports USB devices, as well as numerous other extras that can help make the VM…

GET SCRIPTING A Bash script is simply a series of commands that Mint will run through to complete a certain task. They can be simple or remarkably complex, it all depends on the situation. STEP 1 You’ll be working within the Terminal and with a text editor throughout the coming pages. There are alternatives to the text editor, which we’ll look at in a moment but for the sake of ease, we’ll be doing our examples in Xed. Before you begin, however, run through the customary update check: sudo apt-get update && sudo apt-get upgrade. STEP 2 There are several text editors we can use to create a Bash script: Xed, Vi, Nano, Vim, GNU Emacs and so on. In the end it all comes down to personal preference. Our…

To help you on your way to becoming a better coder, we’ve included some great coding projects and ideas that you can apply to your own code, use as a demo for those who are starting to code, or improve and send out into the coding community. Want to learn how to craft some retro code? How about learning how to code a text adventure? These and more are all found in this final section. No matter where you go next in coding, whether it’s on to learning more languages, creating amazing apps and games, or helping out and teaching new coders to avoid the pitfalls you made, remember the basics, and have fun! From here, it’s down to you and your imagination. So dream it, and code it.…

THE GOLDEN ERA OF CODE While it may seem a little counterproductive to learn how to code in a language that’s virtually obsolete, there are some surprising benefits to getting your hands dirty with a bit of retro coding. Firstly, learning old code will help you build the structure of code as, regardless of whether it is a language that was developed yesterday, or forty years ago, code still demands strict discipline to work correctly. Secondly, everyday coding elements, such as loops, sub routines and so on, are a great visual aid to learn in older code, especially BASIC. Lastly, it’s simply good fun. GOING BASIC The easiest retro language to play around with is, without doubt, BASIC. Developed back in the mid-sixties, BASIC (Beginner’s All-Purpose Symbolic Instruction Code) is…

DEF BEGINNER(MISTAKES=10) Here are ten common Python programming mistakes most beginners find themselves making. Being able to identify these mistakes will save you headaches in the future. VERSIONS To add to the confusion that most beginners already face when coming into programming, Python has two live versions of its language available to download and use. There is Python version 2.7.x and Python 3.6.x. The 3.6.x version is the most recent, and the one we’d recommend starting. But, version 2.7.x code doesn’t always work with 3.6.x code and vice versa. THE INTERNET Every programmer has and does at some point go on the Internet and copy some code to insert into their own routines. There’s nothing wrong with using others’ code, but you need to know how the code works and…

groov-e SportBuds groov-e, www.groov-e.co.uk Price: £39.99/$49.99/43,99 € Do you like to watch videos or listen to music on your tablet while using your cross trainer, exercise bike or other such workout equipment? These sporting true wireless earbuds from groov-e feature an ear hook design to keep them in place while you work out and are rated IPX4 sweat resistant. Their carry case is a 1800 mAh Power Bank which lets you charge other mobile equipment as well as your earbuds. They’re a great price too. Kanex MultiSync Aluminum Keyboard Kanex, www.kanex.com Price: £59.95/$59.95/59.95 Like Apple’s own desktop keyboards, this one’s made of aluminium but unlike Apple keyboards, it can sync with up to three Bluetooth devices and switch between them at the touch of a button. Just the thing if…

Unlike most of AVM’s range of wireless routers, the FRITZ!Box 4060 lacks a built-in modem. This means regardless of how your network interacts with the Internet, you can use the 4060 by connecting it to your existing modem, which was probably supplied by your ISP. Whatever your type of Internet connection (be it ADSL, fibre, cable or mobile data), even if your Internet Service Provider forces you to use their own modem hardware, you can switch off the router section of your ISP-supplied device and connect the FRITZ!Box 4060 instead. But what advantages does this bring? As you’d expect, the router’s wireless capabilities include compatibility with the new Wi-Fi 6 protocol, which gives faster speeds, and is much better at dealing with multiple, simultaneous connections. If you’re working on your…

Twelve South has a reputation for making excellent Apple peripherals that are both useful and decorative. Unfortunately, TimePorter is not such a device. An accessory travel case and charging stand for your Apple Watch, TimePorter is the same size and shape as a spectacle case but with a hole on the top for you to fit your watch’s charging cable. You have to supply your own – there’s no Apple Watch cable in the box. So what you’re left with is a metal case with space for your spare watch bands and a rubber interior frame for wrapping your charger. Is this enough to justify the price? Not really. You could just as easily keep your cable and watch straps in a real spectacle case (who doesn’t have a spare?)…

If you’re lucky enough to have a FRITZ! Box router with DECT compatibility, you can connect up to six wireless phones and position them anywhere in the house. They connect to the phone line through your router, so they don’t need to be plugged into a telephone socket. FRITZ!Fon C6 is such a phone and it’s had an impressive makeover. The body of the phone is pleasingly ergonomic and although it’s pretty minimalist in design, a clever interface makes it easy to access its unique features such as Internet radio, answer machine, email, podcasts, RSS feeds and even a baby monitor. If you have more than one FRITZ!Fon in the house, you can make internal calls between them. The new C6 model has an excellent hi-res colour screen and you…

Alert Indoor Security Camera is an affordable way to keep an eye on your home, but it doesn't lack in smart features. After connecting the camera to your Wi-Fi network and pairing it with the SWANN Security app on your smartphone or tablet, you can view and capture high-quality video in 1080p full HD. It has a passive infrared sensor that can detect movement at up to 32 feet, and it can also detect loud noises and heat too. The camera then sends a push notification to your phone and starts video recording. You get free cloud storage, which saves clips for seven days, and they're also stored locally for two days. A full 110-degree viewing angle decreases blind spots, and there’s a mic and speaker built-in for two-way talk…

Universal Purchases are awesome. Rolled out earlier this year, the feature lets developers bundle iOS, tabletOS and macOS versions of an app into a single purchase. Instead of having to pay once on the Mac App Store and again on the Mobile App Store, a single payment unlocks the software on all your Apple devices. GoodLinks is a read-later app that syncs your links across all your Apple gear and being a Universal Purchase isn’t the only thing it gets right. Using GoodLinks is very straightforward. When surfing the web in Safari or a third-party browser, you might come across an article you’d like to save for later perusal. Sure, you can bookmark it or add it to Safari’s Read Later list but GoodLinks gives a more comprehensive and flexible…

Back in the day, you could gather your snaps in the Photos app, design a calendar, a book, greetings cards and more; and order them in print directly from Apple. You can’t do this any more but several third-party services have stepped in to fill the gap. Motif is one such service. Using the free Motif app for your Mac, iPhone or tablet, you can use your photos to create exciting books and calendars directly from your Apple device. On a Mac you can also create and order greetings cards but this feature has yet to make it to the mobile apps. Your pictures are curated automatically so your favourite memories and pictures are easily to hand; and it’s easy to make impressive, professional-looking designs. There are ready-made templates and…

JustStream is an excellent alternative to AirPlay. It can stream video from your Mac to any AirPlay or Chrome cast compatible device, as well as smart TVs from Samsung and LG, Roku boxes, Apple TV and Sony devices. It’s great for viewing slideshows of photos with the family, for example, and as it can mirror your Mac’s screen to the television, it’s good for presentations and demos too, as well as playing movies and videos. You can queue videos and play them in sequence, no need to keep running to your computer room to load the next five-minute holiday movie. Subtitles are supported, and the entire app runs from a menu bar icon and is never in the way while you're streaming. It’s very straightforward to use. Click on the…